2x + y – z = 5
Dividing both sides by 5,

2x

5

+

y

5

−

z

5

= 1
⇒

x

5 2

+

y

5

+

z

−5

= 1
It is known that the equation of a plane in intercept form is

x

a

+

y

b

+

z

c

= 1, where a, b and c are the intercepts cut off by the plane at x, y, and z-axes respectively. Thus, the intercept cut off by the given plane on the x-axis is

5

2